Like many, I've installed hundreds of CA hinges. Never had a failure and the job goes very quickly, now that I've streamlined the technique.

1) Put a crayon stripe down the middle of both sides of the hinge at the flex line. The wax crayon will keep CA off the hinge center for more flexibility. Try to pick a color that helps to "hide" the hinge. Don't be a wise guy and use a Magic Marker!

2) Slide all the hinges into the slots up to the crayon line at all locations of a control surface.

3) Disregard every instruction ever written and put a micro dot of thin CA on one side of each hinge, at the crayon line with the control surface held upright. The CA should roll off the crayon line and down into the wood. You probably can't get a micro dot from a CA bottle, you'll have to use a bulb applicator, or even a toothpick dipped in CA. This step will keep the hinges perfectly in place without pins. The pinholes can lead to tears in the hinge, especially if the hinges are brittle because you didn't put a crayon line on them.

4) Once the CA has dried well (about 2 minutes) mate the control surface hinges into the slots of the plane. Flex the surface to its maximum deflection while holding it tight against the plane and dribble the rest of the CA (3-4 drops) onto each side. Again, this is hard to control with a bottle, easy with a bulb applicator.

Voila! All done.

Once you feel how flexible the hinges on a control surface are with the crayon line, you'll never skip that step again!